According to Chapter 37, what is the root cause of the continuous cycle of birth and death?

The root cause of the endless cycle of worldly existence (Samsara) is identified in Chapter 37 as the 'knowledge of difference' born from ignorance. When a soul, deluded by ignorance, believes 'Parabrahman is different from me; I am not that, I am something else,' this perception of duality subjects the individual to the eternal cycle. The text states that for one who holds such a belief, death follows birth, and rebirth follows death, turning the wheel of Samsara eternally behind him. Liberation from this cycle requires overcoming this deluded sense of separation from the ultimate reality.